After installation
On the each Jira issue details page you should see an additional quick-add button “Start / Stop timer“ inside of issue content bar (see the image below).
The actual section with timer and other configuration options will appear after you click the “Start / Stop timer” button (see the image below) and it will be visible for the next time you come back to the issue again.
Manage your Clockify API token
Add token
Section about adding token
Remove token
Section about removing token